For Visible, anything above their cheapest plan will give you the same priority as postpaid Verizon. Many prepaid carriers will gladly take more money to shift you to a higher priority.

There is a list of all the prioritization tiers (aka QCI, or premium data) on all the three main US carriers here:

https://old.reddit.com/r/NoContract/comments/1mxogtx/data_pr...